Table 2.
Adjusted Odds Ratios for SLNB in women receiving breast-conserving surgery in SEER-Medicare, 2000–2005 (n=17,177)
| Adjusted Odds Ratio | 95% CI | ||
|---|---|---|---|
| Race (ref.= Caucasian American) | African American | 0.71* | (0.52–0.97) |
| Age (ref.= 65–69 yr) | 70–74 yr | 0.98 | (0.82–1.16) |
| 75–79 yr | 0.88 | (0.74–1.06) | |
| 80+ yr | 0.67** | (0.56–0.82) | |
| Marital status (ref.= Married) | Unmarried or Unknown | 0.95 | (0.83–1.09) |
| Dual eligibility for Medicaid (ref.= No) | Yes | 0.70** | (0.55–0.89) |
| NCI comorbidity score (ref.= 1+) | 0 | 1.04 | (0.91–1.19) |
| Tumor stage (ref.= Stage IIB or NOS) | Stage I | 1.84** | (1.46–2.31) |
| Stage IIA | 1.36* | (1.06–1.74) | |
| Tumor grade (ref.= Poorly differentiated and Undifferentiated) | Well differentiated | 1.57** | (1.29–1.91) |
| Moderately differentiated | 1.28** | (1.09–1.51) | |
| Unknown, not assessed | 1.27 | (0.98–1.64) | |
| Estrogen receptor status (ref.= Positive) | Unknown | 0.89 | (0.72–1.11) |
| Negative | 0.94 | (0.76–1.17) | |
| Year of diagnosis (ref.= 2000) | 2001 | 2.28** | (1.81–2.88) |
| 2002 | 5.22** | (4.01–6.79) | |
| 2003 | 10.74** | (7.79–14.80) | |
| 2004 | 14.01** | (9.89–19.84) | |
| 2005 | 13.97** | (9.25–21.09) | |
| SEER region (ref.= New Jersey) | Connecticut | 0.91 | (0.42–1.97) |
| Detroit | 0.38* | (0.19–0.76) | |
| Hawaii | 0.53 | (0.13–2.22) | |
| Iowa | 0.39* | (0.19–0.80) | |
| New Mexico | 0.74 | (0.27–2.05) | |
| Seattle | 5.57** | (2.80–11.11) | |
| Utah | 0.64 | (0.30–1.40) | |
| Atlanta and Rural Georgia | 1.12 | (0.49–2.58) | |
| All California | 0.51* | (0.31–0.83) | |
| Kentucky | 0.99 | (0.50–1.98) | |
| Louisiana | 0.62 | (0.31–1.22) | |
| Census group percent of non-high school graduates in quartiles (ref.= Quartile 1) | Quartile 2: 25%–<50% | 0.86 | (0.73–1.03) |
| Quartile 3: 50%–<75% | 0.81* | (0.67–0.99) | |
| Quartile 4: >=75% | 0.75** | (0.61–0.92) | |
| Hospital total bed size (ref.= Quartile 1) | Quartile 2: 25%–<50% | 1.34 | (0.89–2.03) |
| Quartile 3: 50%–<75% | 1.99** | (1.26–3.16) | |
| Quartile 4: >=75% | 1.90* | (1.17–3.06) | |
| NCI cancer center designated | 2.87* | (1.19–6.94) | |
| Medical school affiliation (Major/Grad/Limited vs. Unaffiliated) | 1.76** | (1.30–2.39) | |
| Physician surgical volume | 1.04** | (1.03–1.06) | |
| CCOP physician | 2.68** | (1.35–5.34) |
Abbreviations: CCOP, Community Clinical Oncology Program; CI, confidence interval; NCI, National Cancer Institute; NOS, not otherwise specified; SEER, Surveillance Epidemiology and End Results